<template>
  <div>
    <div class="search">
      <input v-model="keyword" type="text" class="search-input" placeholder="请输入城市名或拼音">
    </div>
    <div class="search-content" ref="search" v-show="keyword">
      <ul>
        <li
          v-for="item in list"
          :key="item.id"
          class="search-item"
          @click="handleCityClick(item.name)">
          {{item.name}}
        </li>
        <li class="search-item" v-show="hasNoData">
          暂时不支持该城市呦，我们正在努力覆盖~
        </li>
      </ul>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'

export default {
  name: 'CitySearch',
  props: {
    cities: Object
  },
  data() {
    return {
      keyword: '',
      list: [],
      timer: null,
      scroll: null
    }
  },
  methods: {
    handleCityClick(city) {
      // alert(city)
      this.$store.dispatch('changeCity', city)
      this.$router.push('/')
    }
  },
  computed: {
    hasNoData() {
      if (!this.keyword) {
        return false
      }
      if (!this.list.length) {
        return true
      }
      return false
    }
  },
  watch: {
    keyword() {
      if (this.timer) {
        clearTimeout(this.timer)
      }
      if (!this.keyword) {
        this.list = []
        return
      }
      this.timer = setTimeout(() => {
        const result = []
        for (let i in this.cities) {
          this.cities[i].forEach(item => {
            if (item.spell.indexOf(this.keyword) > -1 || item.name.indexOf(this.keyword) > -1) {
              result.push(item)
            }
          })
        }
        this.list = result
        this.$nextTick(function() {
          // 初始化 better-scrool
          this.scroll = new Bscroll(this.$refs.search)
        })
      }, 500)
    }
  }

}
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .search
    height: .72rem
    padding: 0 .1rem
    background: $bgColor

    .search-input
      box-sizing: border-box
      width: 100%
      height: .62rem
      padding: 0 .1rem
      line-height: .62rem
      text-align: center
      border-radius: .06rem
      color: #666

  .search-content
    z-index: 1
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    background: #eee

    .search-item
      line-height: .62rem
      padding-left: .2rem
      background: #fff
      color: #666
</style>
